Flat / ODS hosting
ODS hosting: share OpenDocument spreadsheets online
Publish an ODS workbook from LibreOffice Calc or another spreadsheet editor. Upload through your browser or the CLI and send a link to its data preview and original download.
Checking your upload limits... · Public · Limits
Drop your ODS files here
or choose them from your device.
Select ODS filesWhat readers see at your ODS link
Flat shows OpenDocument spreadsheet data in a read-only grid, with tabs for workbooks containing several sheets. The screenshot uses an actual ODS file with Costs and Notes sheets.
The grid displays saved values, not a live Calc session. Formula results depend on what the workbook stores. Styles, charts, and page layout are not reproduced as a full document view.
A single file opens in the viewer. Several files open in the explorer, where readers can choose a file. Public links need no Flat account. Original downloads remain available if a preview cannot load.
The main link opens Flat's viewer. The exact path /project-costs.ods serves the original file, without changing its contents.
How to upload ODS files and get a link
Prepare your file
Save the completed workbook as ODS after recalculating it in your editor. Check sheet names, number formats, and any cells whose results depend on external files.
Upload the ODS file itself without unpacking it. If recipients need the printed layout, export a PDF alongside it. Keep the ODS original for editing in a compatible application.
Publish from your browser or terminal
In your browserGo to uploaderDrop, publish, copy the link.
Drop your finished files into the uploader above, or select them from your device. Enter your email if signed out, then choose "Publish files".
Selected files need unique names and publish at the top level. Use the CLI for folders; the browser uploader does not accept folders or extract ZIPs.
TerminalNode.js 20+One command. Files or folders.
npx -y @getflat/cli deploy ./project-costs.odsReplace the example path with your file. Pass a folder to publish related files with their relative paths intact. The CLI prints the published URL.
Check before sharing
Compare the published sheets and saved results with your editor. Open the downloaded ODS in the application your recipients use if they need to edit it.
Signed-out uploads expire after 1 hour by default. Sign in before expiry to keep them online, or sign in before publishing for no default expiry.
What you can share with ODS hosting
Calc workbook handoffs
Give collaborators a quick view of the saved data and the OpenDocument original they need for further work.
Open-format datasets
Keep related tables and explanatory notes in a workbook that recipients can download into compatible spreadsheet tools.
Keep a version, or keep an address.
Share this version
Every upload gets its own link. Publishing revised files creates a new link and leaves the earlier version unchanged. Use the version link when someone needs to review a specific upload.
Update files at one address
Use a named onflat.page address or your own domain. Sign in, then publish with the CLI using --domain. Publish revised files with the same domain to point that address to the new upload.
Named addresses are included on Free. Adding your own domain requires a paid plan. The browser uploader does not set up or repoint these addresses.
ODS hosting questions
Is hosting free, and what are the limits?
Yes. Signed-in Free includes 5 MiB per upload, 1 GiB of storage, and 5 GiB of monthly transfer, with no default expiry. The per-upload limit covers all files in that upload. Paid plans raise these limits.
Do readers need a Flat account?
No. Public links open without a Flat account. Anyone with the link can open the uploaded files. Password-protected links also require the visitor password.
Can I password-protect my upload?
Yes. Password protection is available on every plan. Add --password YOUR_PASSWORD to your CLI deploy command. It protects access to the upload and its files, but does not prevent someone with access from saving a copy. The browser uploader creates public uploads.
Can I replace files without changing the link?
A version link always refers to its original upload. For same-address updates, use a named address or your own domain. Publish revised files with the same --domain value in the CLI to point that address to the new upload.
What happens when an upload expires?
Flat stops serving it. An expired upload cannot be recovered. Signed-out uploads expire after 1 hour by default. For browser uploads, use the sign-in link shown after publishing. For CLI uploads, run npx -y @getflat/cli login. Complete sign-in before expiry to keep the upload online. If you chose a shorter expiry in the CLI, that deadline stays in place.
Do readers need LibreOffice?
They can inspect a supported data preview in their browser. To edit the workbook or use its formulas and charts, they need the downloaded ODS and a compatible spreadsheet application.
Can I share the same data as CSV?
Export the sheet you want as CSV in your editor, then publish it separately or alongside the ODS. CSV holds one table; ODS can preserve multiple sheets and workbook information in the original file.
How large can an upload be?
Upload allowances depend on your plan and cover all files in the upload. Compare current plan limits. Preview availability also depends on format and processing support. The original file remains available to download if a preview is unavailable.
Can I embed the viewer on another website?
Flat's generated viewer cannot be embedded in an iframe and keeps Flat branding on every plan. Link to the viewer for reading or to the exact file URL for the original.
Another spreadsheet format?
Find the guide for your spreadsheet file.
Give your ODS files a link.
Publish your file, check the preview, and share the URL.
Publish filesFree to start · View pricing